What is the meaning of gas in English?

Learn vocabulary with pictures as well as definitions of gas in English

Flammable liquid obtained from the distillation of petroleum and used, among other things, as fuel for combustion engines.

Gas used as a combustible fluid.

Accumulation of expanding, low density fluid in the digestive tract.

Special mask which has air filters that protect against harmful gasses and is fitted on the face using adjustable straps.